Sound Absorbing Structure With Parallel Rigid Partitions
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Solution Overview
Problem
Existing sound absorbing and insulating structures face limitations in achieving high performance due to constraints on shape and thickness, particularly in reducing sound wave velocity effectively across various frequencies.
Innovation Solution
The design incorporates a back panel with parallel, rigid partitions of varying lengths, forming resonant spaces filled with acoustic absorbents, and a method to measure and tailor the frequency range of sound waves, determining the size and interval of resonators to optimize sound absorption and insulation performance without altering the structure's thickness or space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If partitions having relatively complex shapes are used to adjust the effective propagation distance of waves, then sound absorption performance is improved, but structure complexity increases
Solution Approach 1:
The patent changes the parameter of partition shape from complex to simple (flat-plate shape), while compensating by adjusting other parameters such as the interval between partitions and the length of partitions to achieve the desired effective propagation distance and sound absorption performance
Solution Approach 2:
The patent applies local quality by having partitions with different lengths arranged in a specific pattern, where each local region has optimized characteristics for its function, with longer partitions providing different acoustic properties than shorter ones, while maintaining overall structural simplicity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces sound wave propagation velocity, enhancing sound absorption and insulation performance across a wide frequency range, including low frequencies, by inducing multiple resonant modes and improving absorption coefficients and transmission loss.
Implementation Method 1
a plurality of resonators arranged between the rear panel and the front panel around a space connecting the penetration holes of the rear panel and the front panel, wherein the resonators includes a plurality of rigid partitions arranged in parallel with each other to form resonant spaces
Data Source
AI summary
Provided are a sound absorbing and insulating structure is configured to be placed in a sound wave propagation path to reduce noises, and a method of designing the sound absorbing and insulating structure. The sound absorbing and insulating structure includes: a back panel arranged along a sound wave propagation path and having a flat-plate shape; a plurality of rigid partitions spaced apart from the back panel and arranged at intervals in parallel with each other so as to form resonant spaces; and a fixation frame fixing the rigid partitions to the back panel.